Improvement in machinery for cutting waved edges on leather



I -S".'B. RA NDALLQ MACHINERY FOR CUTTING WAVED EDGES ON LEATHER STRAPS.

Patented May 2,1876,

r/ i \E I 517. In I U ITED STATES PATENT Orrron.

SILAS B. RANDALL, OF CINCINNATI, OHIO.

IMPRGV EMENT IN MACHINERY FOR CUTTING WAVED EDGES 0N LEATH ER.STRAPS.

Specification forming part of Letters Patent No. 176,809, dated May 2,1876; application filed January 14, 1876.

' To all whom it may concern:

Be it known that I, SILAs'B. RANDALL, of Cincinnati, Hamilton county,Ohio, have invented a new and useful Machine for Cutting Waved Edges onLeather Straps, of which the following is a specification:

My invention is an improvement on those machines for cutting waved edgeson leather straps which employ a pair of rollers, of which one carriesthe cutting-blades and the other,

supports the leather; and my improvement comprises collars or flanges onthe supportingroll to confine the strap laterally, and also thecutting-roll. My improvement further com- .prises means whereby theblades of the cuttin g-roll and the corresponding waved grooves v of thesupporting-roll are maintained in their proper relative positions duringthe temporary I separation of the rollers, for the purpose ofintroducing or of removing the strap at some other part than at one ofits extremities.

My invention comprises a device for guarding the knives and forliberating the scalloped strap.

In the accompanying drawings, Figure l is a rear perspective view of acutting-machine embodying my invention. Fig. 2 is a'section at the line00a. Fig. 3 is a section at the line A is a frame or housing, whosestandards B B have fixed bearings O for the journals D D of the upper orcutting roller E, and slots b b for the vertical shiftable bearings N Nof my lower or supporting and guiding roll G. The upper roll E'comprisesa central shaft or hub, e, and a number of sleeves, e 6, whose ends arewaved to correspond with the desired undulations of the waved cutters HH, which are simply flat rings or annuluses of steel, whose outermargins are brought to a sharp edge, and whose introductions andclampings between the waved sleeves retain a said blades to the wavedform required. The

lower roll G also comprises a shaft or hub, g, and sleeves g g, ofprecisely similar waved ends to those of the upper roller, and whichinclose rings h and h, whose diameter is small enough and thicknessgreat enough to prevent contact of the knives 'or cutters with .theupper roller. These rings h h are preferably of copper, or othercomparatively soft metal.

h h are the waved grooves thus formed. Flanges orcollars R R, whichsurround the lower roller, operate to prevent any surging or endwisedisplacement of either roll relatively to its fellow, and also serve toprevent any lateral displacement of the strap, and to guide the latterin its proper rectilinear path.

Match cog-wheels I I compel 'isochronous rotation of the two rollers,said rotation being effected by means of a winch, J, upon the lowerroller-shaft F. The bearing peripheries of the two rollers being equalin diameter, and theirspeed also equal, it follows that each roll actswith equal draft upon the strap. The desired upward pressure of thesupport ing-roller Gis secured by the action of a rubber or otherspring, K, which presses down-.

ward against a lever, L, whose other extremity bears upwardly againstthe sliding journalboxes N N of said roller. W is'a looped rod, whichpasses through lever I and spring K,

and is tapped into a nut, X, for regulating the tension of the saidspring. Straps N and N pass down from the lever L, and from anotherlever, L, to any suitable in strumentality, such as a treadle orhand-lever, which enables the operator, bydrawing on the strapN, to augrIn order to preserve the proper relative location of the cutting andsupporting rollers during their temporaryseparation, I provide,

on the upper cog-wheel I, two studs, 0 O, and

'on the arm of the winch a spring-latch, P,

having slotspp, corresponding to the said studs; Said winch has also abutton, Q, which, being turned downward, as shown in Fig. 3, holds thelatch away from the studs, and permits a free rotation of the winch. Butshould it be desired to separate the rollers, the operator turns thewinch until it is presented vertically upward, and, disengaging the but-1 machine.

ton, permits the latch P to engage with the studs 0 O, and thus, for thetime being, effectually prevents the rotation of either roller, so thatby no possibility can there be such displacement of the rolls as tobring the knives and the periphery of the supportingroll in contact, soas to cause the knives to be broken by contact with said lower roll.

The vertical dimensions of the slots 19 1) are such as to permit thenecessary depression of the lower roller without disengaging the latch.

T is a metallic cap or cover, made fast to the tops of standards, andhaving tongues or lips t t, which, impinging on that part of theperiphery of the upper roll which is included Y between its cutters,operates to prevent the strap adhering to the periphery of thecuttingroll, and serves to conduct the strap out of the The said coveralso serves to protect the knives against injury from external objects,and as a safeguard to persons handling the machine.

The latching device may be varied without changing its essentialeharacter-as, for example, a single oblong stud might be substituted forthe pair of studs 0 O, or they might be on the winch, the latch being onthe gearwheel; or the latch might be presented downward instead ofupward. I claim as new and of 'my invention- 1. The combination, withthe upper wave cutting and feeding roll H H E, mounted in fixed bearingsG, of the geared lower roll G, providedv with confining collars orflanges R R and wave-grooves h h, and mounted in yielding bearings N N,as and for the purpose set forth.

2. The combination, with the stationary upper roller, of the metalliccap T, whose tongues t t impinge against the rollers periphery, as andfor the purpose set forth.

3. The combination, with the upper cuttingroll, mounted in fixedbearings, and the lower roll, mounted in yielding bearings, oftheQlockin g device, consisting of the studsO 0!, slotted latch P p p,and button Q, as set forth.

In testimony of which invention I hereunto set my hand.

e SILAS B. RANDALL. Attest:

GEO. H. KNIGHT, H. E. KNIGHT.

